[ foh-lee-ey-shuhn ]

  1. the act or process of putting forth leaves.

  2. the state of being in leaf.

  1. Botany.

    • the arrangement of leaves within a bud.

    • the arrangement of leaves on a plant.

  2. leaves or foliage.

  3. Printing. the consecutive numbering of the folios or leaves, as distinguished from pages, of a manuscript or book.

  4. the total number of such leaves.

  5. Petrology. a form of lamination produced in rocks by metamorphism.

  6. ornamentation with foliage, or an arrangement of foliage.

  7. Architecture.

    • ornamentation with foils.

    • ornamentation with representations of foliage.

  8. formation into thin sheets.

  9. the application of foil to glass to make a mirror.

Origin of foliation

First recorded in 1615–25; foliate + -ion

Other words from foliation

  • sub·fo·li·a·tion, noun
  • su·per·fo·li·a·tion, noun

Words Nearby foliation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use foliation in a sentence

  • The recesses on the sides of the other cusps indicate their single or double lines of foliation.

  • Between the asterisk in my text (supra) and the one following ford before the foliation mark f. 364, the ai.

    The Bbur-nma in English | Babur, Emperor of Hindustan
  • On the oak-beamed ceiling, across the ivory rosettes, a single bar of red sunlight lay, broken by rafter and plaster foliation.

    The Younger Set | Robert W. Chambers
  • The design of the slab on the south, formerly the back, is also rude foliation.

  • Simple Gothic foliation is merely the triple, quadruple, or variously multiple repetition of such intersection.

    The Eagle's Nest | John Ruskin

British Dictionary definitions for foliation


/ (ˌfəʊlɪˈeɪʃən) /

  1. botany

    • the process of producing leaves

    • the state of being in leaf

    • the arrangement of leaves in a leaf bud; vernation

  2. architect

    • ornamentation consisting of foliage

    • ornamentation consisting of cusps and foils

  1. any decoration with foliage

  2. the consecutive numbering of the leaves of a book

  3. geology the arrangement of the constituents of a rock in leaflike layers, as in schists

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for foliation


[ fō′lē-āshən ]

  1. The set of layers visible in many metamorphic rocks as a result of the flattening and stretching of mineral grains during metamorphism.

Other words from foliation

  • foliated adjective

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.